For each of the following, decide whether it represents a likely trend in weather or in climate: (a) an increase in the number of thunderstorms in your area from one summer to the next; (b) a decrease of 20% in the depth of a mountain snowpack between 1975 and 2015; (c) a rise in the average winter temperatures in a particular area over a decade; and (d) an increase in the earth’s average global temperature since 1980.
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